Ya know, my first thought was, you're probably going to replace the fuel filter , so just dis connect the fuel line there, hit the key and let the pump do the rest. The few drops of junk gas left will be more than diluted enough when you fill the tank...
Then as I scrolled down the page, I saw the pic of the sludged up tank. and then I thought, Hmmm,,, 10 years ya say.... Maybe it is best to drop it and just check things out. Better safe than sorry! Save the above approach for something 5 years or less.
Ya know, here's the thing, 10 years is a very long time to park a car. Maybe things are ok, but then again, there is a chance that they're not. It's like the commercial with Tracy Morgan, "I'm pretty sure vs knowing for sure". With my luck, if took the gamble I'd loose.